nsDOMSerializer.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- *//* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */#include "nsDOMSerializer.h"#include "nsIDOMNode.h"#include "nsIDOMClassInfo.h"#include "nsIOutputStream.h"#include "nsINode.h"#include "nsIDocument.h"#include "nsIDOMDocument.h"#include "nsIDocumentEncoder.h"#include "nsIContentSerializer.h"#include "nsString.h"#include "nsReadableUtils.h"#include "nsContentCID.h"#include "nsContentUtils.h"#include "nsDOMError.h"
nsDOMSerializer::nsDOMSerializer()
{
}
nsDOMSerializer::~nsDOMSerializer()
{
}
// QueryInterface implementation for nsDOMSerializer
NS_INTERFACE_MAP_BEGIN(nsDOMSerializer)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIDOMSerializer)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(XMLSerializer)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsDOMSerializer)
NS_IMPL_RELEASE(nsDOMSerializer)
static nsresult
SetUpEncoder(nsIDOMNode *aRoot, const nsACString& aCharset,
nsIDocumentEncoder **aEncoder)
{
*aEncoder = nsnull;
nsresult rv;
nsCOMPtr<nsIDocumentEncoder> encoder =
do_CreateInstance(NS_DOC_ENCODER_CONTRACTID_BASE "text/xml", &rv);
if (NS_FAILED(rv))
return rv;
PRBool entireDocument = PR_TRUE;
nsCOMPtr<nsIDOMDocument> domDoc(do_QueryInterface(aRoot));
if (!domDoc) {
entireDocument = PR_FALSE;
rv = aRoot->GetOwnerDocument(getter_AddRefs(domDoc));
if (NS_FAILED(rv))
return rv;
}
// This method will fail if no document
rv = encoder->Init(domDoc, NS_LITERAL_STRING("text/xml"),
nsIDocumentEncoder::OutputEncodeBasicEntities);
if (NS_FAILED(rv))
return rv;
nsCAutoString charset(aCharset);
if (charset.IsEmpty()) {
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
NS_ASSERTION(doc, "Need a document");
charset = doc->GetDocumentCharacterSet();
}
rv = encoder->SetCharset(charset);
if (NS_FAILED(rv))
return rv;
// If we are working on the entire document we do not need to// specify which part to serializeif (!entireDocument) {
rv = encoder->SetNode(aRoot);
}
if (NS_SUCCEEDED(rv)) {
*aEncoder = encoder.get();
NS_ADDREF(*aEncoder);
}
return rv;
}
NS_IMETHODIMP
nsDOMSerializer::SerializeToString(nsIDOMNode *aRoot, nsAString& _retval)
{
NS_ENSURE_ARG_POINTER(aRoot);
_retval.Truncate();
if (!nsContentUtils::CanCallerAccess(aRoot)) {
return NS_ERROR_DOM_SECURITY_ERR;
}
nsCOMPtr<nsIDocumentEncoder> encoder;
nsresult rv = SetUpEncoder(aRoot, EmptyCString(), getter_AddRefs(encoder));
if (NS_FAILED(rv))
return rv;
return encoder->EncodeToString(_retval);
}
NS_IMETHODIMP
nsDOMSerializer::SerializeToStream(nsIDOMNode *aRoot,
nsIOutputStream *aStream,
const nsACString& aCharset)
{
NS_ENSURE_ARG_POINTER(aRoot);
NS_ENSURE_ARG_POINTER(aStream);
// The charset arg can be empty, in which case we get the document's// charset and use that when serializing.if (!nsContentUtils::CanCallerAccess(aRoot)) {
return NS_ERROR_DOM_SECURITY_ERR;
}
nsCOMPtr<nsIDocumentEncoder> encoder;
nsresult rv = SetUpEncoder(aRoot, aCharset, getter_AddRefs(encoder));
if (NS_FAILED(rv))
return rv;
return encoder->EncodeToStream(aStream);
}